In this present study, 34 Hydrochemical data of groundwater samples in Annaba – El-Tarf areas were examined with an aim to assess the Scaling and corrosion tendencies of water using Langelier and Ryznar indexes. Hydrochemical and statistical methods such as Piper and Chidah diagrams were also applied to the data set. The results obtained show that 73.53% of the samples are classified into intolerable corrosion, 20.59% of the samples have little scale or slightly corrosive. The samples show the same property with respect to the two indexes. Hydrochemical characteristics show that Cl- and HCO3- are the major anions and Na+ and Ca2+ are the major cations in water of the studied area. However 23.52% of the samples exceed the desirable limit of Cl-, 20.58% of Na+, and 8.82% of them exceed that of SO42+. Groundwater types were assessed and compared with Piper and Chdha diagrams, it was found that Na-Cl is the dominant type, in both methods.

Attoui B, Kherici N, Kherici-Bousnoubra H. 2014. Use of the new method for determining the vulnerability and risk of pollution of major groundwater reservoirs in the region of Annaba-Bouteldja (NE Algeria). Environmental Earth Sciences 72, 891-903.